I work in a London University and was told that I'm not allowed to have my 6 year old visit me, not could I bring my second baby 3 years ago, due to them not being covered by insurance. For them to come in I would need a special letter from the Head and my line manager said that in general "it's frowned upon".
Does anybody have an idea of what this means and why it's so hard to show my child where I work? Or is it a uk-wide thing that's the norm in any educational institution?